A dictionary of architecture and building; biographical, historical and descriptive (1901)
Sturgis, Russell, 1836-1909 · New York, Macmillan · leaf 561
Fig. 41. B. Couoidal, the smaller base semicircidar,the larger semielliptical (Fig. 10) : rr is the ridgeline. … C. In the form shown in Fig. 11, the basesare as in Fig. 10, and the elements of the sur-face at the springing are straight lines parallelto the axis, but the ridge is curved, the expan-sion being in a vertical direction only. The94S VAULT surface, not being gtuenitod by tlie movementof any line,…
Architecture
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